VERY EASY
be
was/were - been (ser o estar)
find
found - found (encontrar)
pay
paid - paid (pagar)
dig
dug - dug (cavar)
bear
bore - borne (soportar)
win
won - won (ganar)
do
did - done (hacer)
go
went - gone (ir)
spend
spent - spent (gastar)
spin
spun - spun (girar)
see
saw - seen (ver)
cut
cut - cut (cortar)
think
thought - thought (pensar)
lend
lent - lent (prestar)
shave
shaved - shaved/shaven (rasurar)
eat
ate - eaten (comer)
put
put - put (poner)
feel
felt - felt (sentir)
lose
lost - lost (perder)
slide
slid - slid (deslizar)
drink
drank - drunk (beber)
write
wrote - written (escribir)
forget
forgot - forgotten (olvidar)
forbid
forbade - forbidden (prohibir)
shrink
shrank/shrunk - shrunk/shrunken (encoger)